Method of making castings.



No. 741,377. PATENTED 0.0T. 13, 1903. W. 1). SARGBNT.

METHOD" OF MAKING GASTINGS.

APPLICATION FILED JUNE 3, 1901.

N0 MODEL. 2 SHEETS-SHEET 1.

N0 MODEL.

PATENTED OCT. 13, 1903.

W. D. S'ARGENT.

METHOD OF MAKING GASTINGS. ATPLIOATION FILED JUNE 3. 1901.

2 SHEETS-SHEET 2.

UNITED STATES iatented October 13, 1903s PATENT FFFCE WILLIAM DURHAM SARGENT, OF CHICAGO, ILLINOIS, ASSIGNOR. TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

METHOD OF MAKING CASTINGS.

SEPEGIFIGATION forming part of Letters Patent No. 741,377, dated October 13, 1903.

Application filed June 31 1901. $erial No. 62,955. (110 specimens.)

T0 aZZ whom it may concern:

Be it known that 1, WILLIAM DURHAM SAR- GENT, a citizen of the United States of America, residing in Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Methods of Making Castings, of which the following, taken in connection with the accompanying drawings, is a.

specification.

My invention has special reference to improvements in methods of making castings, the object of which is to reduce the amount of flask-room necessary in the formation of the mold and the amount of waste material which is ordinarily lost in the gates or sprues and has to be remelted in order to make use of it again. I

In orderthat my invention may be clearly understood, I will explain the same in connection with the accompanying drawings, in which--- Figure 1 represents in plan view a moldingflask with a pattern in the same designed for use in carrying out my invention. Fig. 2 is a side view of the pattern-board used. Fig. 3 is a sectional view through the flask and pattern. Fig. at is a sectional view through the mold after it has been formed, taken on two different lines, a different section being shown on each side of the center line. Fig. 5 is a perspective view showing a brake-shoe insert formed in accordance with my invention. Fig. 6 shows a modified method of carrying out my invention. Fig. 7 shows a side view of the pattern used in Fig. 6. Fig. 8 is a sectional view through the flask and pattern. Fig. 9 is a section through the mold after it has been formed, and Fig. 10 is a perspective view showing a brake-shoe insert formed in accordance with the modification of myinvention shown in Figs. 6 to 10.

Referring now more specifically to the form of the invention shown in Figs. 1 to 5, inclusive, it will be seen that I provide first a pattern-plate having patterns secured thereto or integral therewith, said plate being marked 11 and the individual patterns 11. On the pattern-plate is placed afiask 12, and the sand having been put on top of it and rammed down in the usual manner the half-mold 12 thus formed is inverted andthe pattern re'-' moved. The half-mold 12 is formed in like manner. Then the two half-molds are finished and put together, the chambers for forming the inserts will appear as shown in Fig. 4, in which 13 is the gate through which the metal is introduced into the mold, and 14:, 15, and 16 represent three chambers shaped to form inserts, the said chambers being connected withan intermediate communicating web passage-way or canal 17, which forms the means whereby the metal flows from one into the next adjacent one. By the arrangement described it is obvious that a large number of insert-patterns can be grouped together in a minimum space and that the metal in flowing from one to another will flow through the chamber formed for the purpose of castingthe first one into which it enters, so that each chamber, or at least each chamber adjacent to the gate, forms a passage-way or canal through which the metal flows to reach the next adjacent insert. One of the inserts after it is formed is shown clearly at 19 in Fig. 5 and as shown has a broken or ragged edged flange 18 extending clear around it, caused by breaking the insert away from its neighbor in the casting as completed. These inserts being formed of white iron of a brittle character can readily be broken away in this manner; but in order to facilitate the operation still more I make the intervening plate of metal connecting two adjacent inserts very thin. The connections which thus hold the several inserts in a finished casting may be formed in any one of a number of different ways, and I have shown another way of arranging it in Figs. 6 to 10, inclusive, wherein the different insert parts are connected in the pattern and also in the finished casting by means of narrow neck portions instead of a continuous web, as is shown in Figs. 1 to 5, inclusive.

From the above it will be readily seen that my invention differs from the usual method 5 to flow from one to the other, so that there is no single one of the casting-pieces which is not directly connected with at least one of its neighbors by a frangible or breakable neck portion. By this process also I produce a casting in which the metal is run in from several or all of its sides at once, which makes it a very superior quality and very homogeneous.

By records taken from actual shop practice I have found that this new method of making castings effects a saving in the formation of brake-shoe inserts amounting to as much as thirty and a half per cent.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The described method of forming individual. castings Which consists in arranging a plurality of chambers closely adjacent to and connected immediately with each other without separate runways, about a central gate,

the narrow open spaces between them causing the metal to flow directly through each mold in order to fill the other, and then separating the castings from each other by breaking the frangible connections between them, substantially as described.

2. The described method of making individual castings which consists in arranging a plurality of chambers closely connected with each other on all sides and grouped about a central gate, the whole in such relation that the metal in reaching any one of the chambers passes through other chambers rather than a gate, pouring the metal to form all the castings at once and then breaking them apart along the thin line of separation between the separate chambers, substantially as described.

3. A casting consisting of a series of body parts closely connected together by thin frangible flanges. upon all sides of each of the body parts, the metal being run in from all directions, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WVILLIAM DURHAM SARGENT.

Attest:

PAUL CARPENTER, H. W. SMALLEY. 

